I have no illusions that Thune is going to bust onstage at a brokered convention and wrest away the nomination, though if he did the weeping and cheers and soaring soundtrack might resemble the end of Rudy. The senator gave his endorsement to Romney last November, along with dozens of others in Congress.

The current crop of GOP hopefuls is what it is.

So this isn’t just a paean to one senator out of 100 and the GOP’s best chance out of the other four hopefuls, but an ode to everyone banging his or her head against the wall when looking at the limitations of their primary ballot.

This is a political campaign in which we’ve overdosed on “meh” by this point, with challengers you never thought you’d see at the top of the polling all taking their turns as the anti-Romney. While taking a break from writing this piece to go run an errand, I saw the pinnacle of anybody-but-Mitt sentiment: a “Republicans for Obama” bumpersticker.

Especially in this era of social media and overkill media exposure — can you imagine if Calvin Coolidge had to do the round of primary debates today? — “meh” kills a presidential campaign. Especially when you’re up against an incumbent. Bob Dole? Meh. John Kerry? Meh meh. Ronald Reagan? Vavava-voom, buh-bye Carter. Americans elect the candidate they like better, and this is backed up by favorability ratings going into elections.

Gallup found in polling released last week that Democrats are more charged up about Obama than Republicans are about any of the presidential hopefuls — more than double the positive intensity score.

So if Republicans are meh on a nominee, imagine how the general electorate will feel. And the Obama campaign offensive hasn’t even begun against the eventual nominee, yet is assuredly scooping up every juicy bit of the gaffetastic primary into their arsenal.

The PJM poll last month found only Rick Santorum edging out Obama in a hypothetical head-to-head matchup, with a block of undecideds who could turn either way. The polling sample was a third Democratic, a third Republican, and a third “something else.”

In match-ups with “fantasy candidates” — Mitch Daniels, Paul Ryan, Chris Christie, Jeb Bush, Sarah Palin, and Condoleezza Rice — only Rice edged out Obama, suggesting that voters are so eager for a “none of the above” GOP choice that they’d handily latch onto someone completely out of right field, who hasn’t even dabbled with the idea of a presidential campaign.

Not offered in the hypothetical head-to-heads? John Thune, who could also handily take on Obama in one-on-one hoops action. And that would be a hypothetical that doesn’t even take into account the moment when the voting public would endlessly see and hear the two on TV.

And I guess we’ll never know. I know, by playing hard to get this time around Thune is well-poised for 2016, especially if Joe Biden takes a shot at the White House. Like shooting fish in a barrel.

But for 2012, the Republican slate is what it is: no one to give the DNC — or Obama — nightmares.